Book Image

Kotlin - Tips, Tricks, and Techniques [Video]

By : Nigel Henshaw
Book Image

Kotlin - Tips, Tricks, and Techniques [Video]

By: Nigel Henshaw

Overview of this book

<p>Do you want to see an increase in your productivity as an Android developer? With this course, you will discover new possibilities with Kotlin and improve your app development process.</p> <p>In this course, you will work with interesting tools and techniques on examples which you can adopt straightaway. You will speed up your development with less coding and get faster results. By the end of this course, you will be able to write faster, cleaner code and make your life easy as a Kotlin developer.</p> <p>The code bundle for this video course is available at -&nbsp;<a href="https://github.com/PacktPublishing/Kotlin-Tips-Tricks-and-Techniques" target="_blank">https://github.com/PacktPublishing/Kotlin-Tips-Tricks-and-Techniques</a></p> <h2>Style and Approach</h2> <p>A comprehensive course packed with step-by-step instructions, working examples, and helpful tips and techniques on working with Kotlin. This course is divided into clear chunks so you can learn at your own pace and focus on your own area of interest.</p>

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Kotlin - Tips, Tricks, and Techniques [Video]
Nigel Henshaw
Sep, 2018 | 2 hours 22 minutes
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Table of Contents (6 chapters)
Free Chapter
1
Techniques to Reduce Development Time and Code
The Course Overview
Using an Expression Body to Reduce a Function to a Single Line
Making Code More Readable with when Blocks
Simplifying Functions with Named Arguments and Default Parameters
Using Extension Functions and Properties to Add More Features
Multiple Method Calls on an Object for Easier Readability
2
Tips to Make Code More Robust and Error-Free
Recommended Methods to Avoid NullPointerExceptions
Using let for Handling Null Expressions
Kotlin Methods for Eliminating Nulls from a Collection
Recommended Methods for Thread Safe Calls
Using Singletons for Thread Safe Code
3
Tips to Create and Use Classes Easier and Faster
Simplifying Class Properties with Constructor Parameters
Using Secondary Constructors for Additional Flexibility
Implementing Custom Behavior for Fields for Adding Functionality
Using Object Expressions for Thread Safe Calls
Using Companion Objects to Replace Java Static Fields
4
Features to Use to Support Functional Programming
Using Lambdas to Simplify Defining Functions
Using Higher Order Functions for Clean Code Abstraction
Using Immutable Collections to Support Safe Multithreading
Using Filter and Map to Quickly Manipulate Collections
Using Data Classes to Conveniently Package and Protect Data
5
Optimizations to Improve App Startup and Performance
Using the Kotlin Bytecode Tool to Observe Additional Overhead
Using Late and Lazy Properties to Delay Initialization
Inlining Higher Order Functions to Avoid Additional Java Calls
Applying const to Companion Object Properties to Avoid Generating Extra Methods
Using Sequences to Avoid Creating Temporary Lists
6
KTX Extensions for Easier Access to Android APIs
Using Core KTX Module for Easier Use of Android APIs
Using SQLite KTX Module to Simplify Database Transactions
Using Fragment KTX Module to Simplify Fragment Transactions
Using Collection KTX Module for Extensive Collection Support
Using Work KTX Module for Simplifying Asynchronous Requests
Chapter 2
Tips to Make Code More Robust and Error-Free
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Section 3
Kotlin Methods for Eliminating Nulls from a Collection
Removing null elements from a collection is a common situation. But this can involve several operations, making code long, verbose, and open to errors. Provide solutions for removing null elements which are concise and clear. - Apply filterNotNull for removing nulls from a collection - Use the listOfNotNull function to create a null-free collection - Run the code for both solutions to confirm that lists have no nulls
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